I run 87 at all times. Even when I'm towing with my 3.4 liter. A higher octane rating does not give you more power. In contrast it loses power because when it burns, the combustion isn't as efficient. On newer vehicles there will be a felt increase in power because the the computer will advance the timing. So unless your vehicle requires premium you are wasting money.

Andrew

 

this was ment to a reponse to a different page. Wrong button.

Andrew